Water Obstacle Course 09/01/2009 by Heidi Your Therapy Source has a video of an example Water Obstacle Course. The obstacle courses include gross and fine motor skills as well as sensory activities! So many possibilities! On the video – One of the activities in the video shows a child running into a mini pool. I would discourage this as the bottom of the pool can be very slippery. Always pick activities that are safe for all ages.